JPG to PNG Converter Free Online Tool 2026

Last updated March 22, 2026

JPG vs PNG: Key Differences

JPG (JPEG) and PNG are both raster image formats but serve different purposes. JPG uses lossy compression — it discards some image data to achieve smaller file sizes, making it ideal for photographs. PNG uses lossless compression — every pixel is preserved exactly, making it ideal for graphics, screenshots, and images with text or sharp edges.

Format Comparison

Converting with Canvas API

function jpgToPng(jpgFile) {
  return new Promise((resolve) => {
    const img = new Image();
    const url = URL.createObjectURL(jpgFile);
    img.onload = () => {
      const canvas = document.createElement('canvas');
      canvas.width  = img.naturalWidth;
      canvas.height = img.naturalHeight;
      const ctx = canvas.getContext('2d');
      ctx.drawImage(img, 0, 0);
      canvas.toBlob(blob => {
        URL.revokeObjectURL(url);
        resolve(blob);
      }, 'image/png');
    };
    img.src = url;
  });
}

// Usage
const pngBlob = await jpgToPng(fileInput.files[0]);
const link = document.createElement('a');
link.href = URL.createObjectURL(pngBlob);
link.download = 'output.png';
link.click();

When to Convert

Convert JPG to PNG when you need transparency (e.g., removing a white background), when the image contains text or sharp lines that suffer from JPG artifacts, or when you need to edit and re-save the image multiple times without quality loss. Note that converting JPG to PNG does not recover lost quality — the lossy compression artifacts from the original JPG are preserved in the PNG.